| [研究进展] 周钰博同学通过在环氧化物的有机催化 ROP中引入可编辑的链转移反应，实现了对脂肪族聚醚分散度、分子量和端基的三重精准控制（相关成果发表在Nature Communication） |
| 发布时间： 2025-11-11 浏览次数： 10 |
|
Title: Dispersity-controlled ring-opening polymerization of epoxide
Abstract:Dispersity or molar mass distribution (ÐM) profoundly influences polymer properties, but its control remains a challenge, especially for ring-opening polymerization (ROP). We report here a simple approach to tailor ÐM of aliphatic polyethers, e.g., poly(ethylene oxide) and poly(propylene oxide), by introducing an editable chain-transfer reaction in organocatalyzed ROP of epoxides. Trifluoroacetate, acting as the chain-transfer agent (CTA), brings about non-uniform growth of polyether chains while ensuring complete initiation efficiency and readily removable CTA residue. Triple control over ÐM (1.05–2.00), molar mass (3.6–17.7 kg mol−1), and end group is achieved simply by regulating the feed ratio, conforming well with the theoretical modeling. Experimental and calculation results reveal the orthogonality between chain growth and transesterification which is key to the three-modular ROP for independent ÐM control. |
